Spark plug igniter



FIG. 1 is a side elevational view of a spark plug igniter showing my new design; FIG. 2 is an enlarged portion perspective view thereof; FIG. 3 is an enlarged plan view thereof; FIG. 4 is an enlarged side view thereof; and, FIG. 5 is an enlarged cross-section of the threaded portion as taken in the direction of arrows 5—5 of FIG. 1. The broken line showing in FIGS. 1-4 is included for the purpose of illustrating environmental structure only and forms no part of the claimed design. 

The ornamental design for spark plug igniter, as shown and described. 